<!-- 主页面 -->
<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type='info' @click='logout'>退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px': '200px'">
        <div class="toggle-button" @click='togglgCollapse'>|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409eff" unique-opened
          :collapse='isCollapse' :collapse-transition="false" router :default-active='activePath'>
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for='item in menulist' :key='item.id'>
            <!-- 一级菜单的模板区 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id"
              @click="saveNavState('/'+subItem.path)">
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
  export default {
    created() {
      this.getMenuList()
      this.activePath = window.sessionStorage.getItem('activePath')
    },
    data() {
      return {
        //左侧菜单数据
        menulist: [],
        //一级菜单字体图标（为什么不把这玩意一起丢数据库= =）
        iconsObj: {
          '125': 'iconfont icon-user',
          '103': 'iconfont icon-tijikongjian',
          '101': 'iconfont icon-shangpin',
          '102': 'iconfont icon-danju',
          '145': 'iconfont icon-baobiao',
        },
        //是否折叠
        isCollapse: false,
        //被激活的链接地址
        activePath: ''
      };
    },

    components: {},

    computed: {},

    // mounted: {},

    methods: {
      logout() {
        window.sessionStorage.clear()
        this.$router.push('/login')
      },
      //获取所有菜单
      async getMenuList() {
        const { data: res } = await this.$http.get('menus')
        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
        // console.log(res)
        this.menulist = res.data
      },
      // 点击按钮 切换菜单栏的折叠与展开
      togglgCollapse() {
        this.isCollapse = !this.isCollapse
      },
      //保持链接的激活状态
      saveNavState(activePath) {
        window.sessionStorage.setItem('activePath', activePath)
        this.activePath = activePath
      }
    }
  }

</script>
<style lang='less' scoped>
  .home-container {
    height: 100%;
  }

  .el-header {
    background-color: #343D41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #ffffff;
    font-size: 20px;
  }

  .el-header div {
    display: flex;
    align-items: center;
  }

  .el-header img {
    height: 3.5em;
  }

  .el-header span {
    height: 1em;
    margin-left: 15px;
  }

  .el-aside {
    background-color: #333744;
  }

  .el-aside .el-menu {
    border-right: none;
  }

  .el-main {
    background-color: #eaedf1;
  }

  .iconfont {
    margin-right: 10px;
  }

  .toggle-button {
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: #ffffff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
</style>